Everyone can determine the content of exercise, choose exercise equipment and increase or decrease the amount of exercise according to their physical condition and physical strength. Practice has proved that people of different ages can achieve better results as long as they have systematic exercise.
I met more than 50 "old people" in the gym, and he was very enthusiastic. He didn't go for a walk on the treadmill, just wanted to exercise his muscles and do equipment exercise, just as you think. You are only in your thirties, so why not?
It is better to move as soon as possible, and the muscles will have a sense of accomplishment when they improve. Doing other things is not necessarily rewarding, and fitness is different. If you give, you will get something back. This is the fairest game.
If you have any other questions about fitness, you can continue to ask.